Part 2: First large-scale biomass preparation and firing at Messebo Cement: Michael Suppaner, A TEC (Austria)

The second part of the presentation, co-authored with Getachew Okbay, Messebo Cement Factory. Filmed at Cemtech MEA 2015, 8-11 February, Grand Hyatt Dubai, UAE

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Thank you Mr. Getachew for the introduction before of the situation in Ethiopia and also your plant. I want to go more into detail about the project we did together was Messebo under the leadership of Mr. Getachew to implement this biomass, sorry, biomass plant and biomass firing into the Messebo Cement Factory. Okay.

First here, this is just giving an overview where is the factory located? In northern part of Ethiopia, as Mr. Getachew already mentioned they have two kiln lines, one 2,000 tons per day, one 3,000 tons per day, and up to now after they were changing a couple of years ago to coal firing, they were using some local coal, and mainly South African coal with imported via Djibouti.

This is just a view of the plant which is 2 kilns, the left one, the big one is line number two. One challenge is as Mr. Getachew also mentioned that the materials coming from 4/500 kilometers away where the Sesame Straw farm is located. So one challenge was also to get the weigh to bale the material, it was a density, that the logistic, that the transport of the material is still feasible and reasonable, and this is basically the first part of the, of our project there, of our joint project.

This is what the material looks like at the farm. We see here the stocks to store and this is after harvesting the wheat. Basically, it's taken by the cement factory by Messebo at the harvesting site. Here's the comparison of the fuels which are the moment in use and which are now coming into use. You see the Sesame straw, you see the South African coal, good quality, local coal, relatively low quality, and for biomass, the Sesame straw, excellent quality basically.

You can see that the moisture content is low, ash content is low. Principally wonderful fuel for a cement plant. The firing is as usual in most modern state of the out cement plant, 4o/60% in the main burner, 60% in the calciner, and then the first phase, or let's say basically it's planed to fire the sesame straw in the calciner.

You have the quantity is 6,700 kilograms of the main burner, 10,000, about 10 tons at the calciner on coal. Here we have some calculations which quantities of fuel will be used. At the end of phase one, when the whole plant is running in full operation, plant is approximately 40% of total fuel to be fired in the calciner. Here are the quantities of 10 tons per hour. We're talking about kiln number 2 now, the 3,000 tons per day day lining, phase one.

Here is the general layout of the processing of the biomass of the straw processing plant. We have here storage hole, we've here the shredder line and the intermediate storage, which extraction and then a long conveyor coming here to kiln line number two. Kiln line number one will be coming in phase two

put into this whole system. Here are pictures, we have seen already from Mr. Getachew, similar pictures from the harvesting site. The straw is pressed into bales with a target of 600 kilograms per cubic meter. This makes it feasible to transport it, also a quite long distance. We have to go there, the trucks are 40 ton trucks and here is the size of the bales which are used there.

Yes, it's a very rough flow diagram or flow block diagram of the handling system starting with the baling at the harvesting site, then we have to transport, and then [xx] storage of bales at the cement factory. The plant is not yet in n operation, it is now final the stage of construction and will be commissioned probably within the next four to six weeks, and here you see the storage hole which has the capacity of about 4-5,000, close to 5,000 tons of the straw and bales.

From this plant, with kind of four clips, the bales

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